<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>WebRTC get audio and video devices</title>
</head>
<body>
      <!--选择读入类型，并且在这些类型里选择读入设备-->
      <div>
            <label>audio input device:</label>
            <select id="audioSource"></select>
      </div>
      <div>
            <label>audio output device</label>
            <select id="audioOutput"></select>
      </div>
      <div>
             <label>video input device:</label>
             <select id="videoSource"></select>
      </div>



      <!--通过script引入js代码，当我们打开页面的时候，js代码就会执行，交给底层的V8引擎去解析渲染-->
      <script src="./js/client.js"></script>
</body>
</html>



